Pick-control mechanism.



A. J. CHEVRETTE. PICK coNTRpL MECHANISM. APPLICATION FILEDAuG.I8.,I9Ie'.

1,280,662. Patented oet. s, 191s.

5 SHEETS-SHEET l.

JMJ, j O www@ we Nam/ers mamas cc..pNo1u-uma..wAsmNcmn, Iz s.

A. J. CHEVRETTE.

PICK CONTRDL MECHANISM.

APPLICATION FILED AUG.I8. I9Is.

PIIIIIIIIIIII GII. 8,1918.

5 SHEETS-SHEET 2'.

I I I I I I I I I I I I I I I I I I I I I SIIIIIIIIIIHI m: nomas FarmsIm.4 f-Hazuumo.. wAsmNcroN. n c.

A. l. CHEVRETTE.

PICK CONTROL MECHANISM. APPLICATION FILED AUG.I6. Isls.

1,280,662. l Patented 0@1;.8,1918.

5 SHEETS-SHEET 3'.

www

A. A1. CHEVRETTE.

PICK CONTROfh MECHANISM. APPLICATION HLED Anims. lala.

4 1,280,662. .Patented oet. 8,1918.v

5 SHEETS-SHEET 5.y

l d, x14 l rig n mz Nonms vzrsns cov. rwomumu.. wAsNmcmN, n. a

UNITED STATES PATENT OFFICE.

AUGUSTIN J'. CHEVRETTE, WORCESTER, MASSACHUSETTS, ASSIG-NOR TO CROMPTON& KNOWLES LOOM WORKS, `OF WORCESTER, MASSACHUSETTS, A CORPORATION 0FMASSACHUSETTS.

Specification of Letters Patent.

PICK-CONTROL MECHANISM.

Patented 0015.8, 191s.

Application led August 18, 1916. Serial N o. 115,610.

Be it kiiownthat I, nnTTn, a citizen of the United States, resid ing atlVorcester, in the county of VVorcester and State of Massachusetts, haveinvented a new and useful Pick-Control Mechanism, of which the followingis a specification.

This invention relates to pickcontrol mechanism designed for use upon asocalled pick-and-pick loom, in which type of loom drop boxes areprovided at each side of the loom and provision is made for picking ashuttle from any one of the boxes onv either' side of the loom at anybeat of the lay. In such looms, through defects in the pattern chains orthrough mistakes inthe manipulation of the loom, it sometimes happensthat both boxes which are actively positioned contain shuttles. Ifeither or both of these shuttles is picked under these circumstances asmash inevitably occurs.

It is the principal object of my present invention to prevent suchpicking of a shuttle when the opposite box is occupied, and also toprevent simultaneous picking of two opposite shuttles. In the attainmentof this object I provide mechanism on each side of the loom forcontrolling the picking devices on the opposite side of the loom, sothat the presence of a shuttle in the active box on one side will renderthepicking devices on the opposite side inoperative.

It is a further object of my invention to control the picking devicesdirectly from the active shuttle boxes, as any less direct system ofcontrol introduces possibilities lof error in operation. For theattainment of this result in the preferred form of my invention, Iprovide indicating members operable in conjunction with the shuttlebinders of the active shuttle boxes, each of said members being eectiveto disable the picking device on the opposite side of the loom when thebox contains a shuttle.

Further features of my invention relate-to improved cam mechanisms forVmoving the picking devices to operative and inoperative positions, andparticularly to cam mecha-V nisms which positively move the pickingdevices to mid-position on each beat of the lay, from which positionthey may be thereafter moved to operative or inoperative po,- sitionaccording to the indication obtained from the shuttle binder. Bythisarrangement the necessary movement of the pick-V ing device, after thecondition of the shuttle box is indicated, is reduced one half, so thatthe device will operate at higher speed and. over a greater range of boxpositions.

' My invention further relates toV certain arrangements and combinationsof parts which will be hereinafter described and more particularlypointed out in the appended claims.

A preferred form of my invention is shown in the drawings in which-Figure l is a front elevation of certain parts of a loom with myimproved mechanism applied to oneV side thereof;

Fig. 2 is a top plan view of certain of the parts shown inl Fig. l, asindicated by the arrow 2 in said figure;

Fig. 3 is a sectionalv elevation taken along the line 8-3 in Fig. 2; f

Fig. t is a sectional elevation r of the actuating cam taken alongtheline 4-4 in Fig. 2';

Fig. 5 is a front elevationof the indicating member which coperates withthe binders of one set of drop boxes;

Fig. 6 is a vertical sectionalV view of a set of drop boxes, takenyalong the line 6 6 in Fig'. 7;

Fig. 7 is a horizontal sectional view'taken along the line 7 7 in Fig.6, and

Fig. 8 is a detail view showing the three positions assumed by one ofthe picking devices.

Referring to the drawings, I have indicated a vfourby-four loom, or onein which a set of four drop boxes is provided atk each side of the loom.I have shown an indicating member coperating with the boxes at theleft-hand side of the loom and connected to control the picking deviceat the righte hand side of the loom. It will be understood that thismechanism is duplicated in practice, a similar indicating membercoperating with' the drop boxes at the righthand side and controllingthe left-hand picking device. is omitted from the drawings'for the sakeof clearness. f Y

The usual cam shaft `V10 isv mounted in bearings in the loom sides 11and 12, and is provided with a pick roll 13 adapted to cooperate with apick cam 14 connected This duplicate mechanism i througha pick arm 15and link 1G to actuate the picker stick 17. 1n the :form shown in thedrawings, a single roll 13 is provided to actuate eachpick arm 14, andwith this arrangement in a piek-and-pick loom the cam shaft makes onecomplete revolution for each beat of the lay. The rollV 13 is mo'untedupon an arm 18 pivotally connected at 19 ytothecam shaft 10. A link Q0is connected at one end to thearm 1S and at its opposite end to asliding collar 21. The collar 21 is controlled in its, longitudinalposition on the shaft 10 by a yoke 22 lformed on a'y lever Qipivoted at24 and connected by a link 25 toa bell crank 26. The meehanism thus fardescribed is of the usual type and` forms n0 part of my invention, Intheoperation thereof the bell crank 2G through the leverrand yoke 2Q slides'the collarl 21- along the shaft 10, and such movement of the collarrocks the arm 18jon its pivot 19 to move the roll 13 intoor'out of rollinto and out of operative position ae- Y cordingto the positions of theshuttlesV in the boxes.. Iv will first describe the indi-l eating ordetecting. device through which the Vindication is` obtained. An uprightlever (Figs. 5 and 6) ispivoted upon a collar 81 which in turnis-pivotedto swing loosely on the end of' afshaft 32, acting as asupport and forming a swivel mounting for the lever 30. `The collar maybe positioned on the shaft bya pin 310 (Figi. 6) in the shaft tendinginto a circumferential slot. 311 in the collar. At: itsupper end thelever 30 is.' provided` with a YportionSOa adapted to engage theswinging outer end of the ybinder 33 .effthe .activelypositionedshuttlebox. A spring 34(Figs. 5 and7) yieldingly moves theleverl so that theportion 3()a is carried to theV rear and to the left as viewedA in Fig.5.

v Inl order to give the lever 30 adetecting movement a lever 35l ispivoted by ya stud 36 (Fig. 6).on the. lay end 37; One portion 35a ofthelever 35 engages the lower end `of the lever 30, while a portion .351extendsinto the `pathofa* stud 38 fixed to the loom frame 11. Atf'each;forward beat` of the lay the stud 38 engages the lever 35, swingingthepOrtiOnBS'Q- to the left, and thus moving the portionrfg()a of thelever`30-to the right beyond theend ofthe shuttle binder 83. 1f

a shuttle has entered the active shuttle boxl the corresponding binderwillv have been pushed forward, the lever 30 will engage the end of thebinder as the lay moves baek'and will thusbe heldin the positionshownfin Fig. 5. .If the boxis empty, however the portion 30a will notengage the end of the binder, but wil move to kthe left under theinfluence of the spring 34. Such movement occurs as soon as the lay hascarried the lever 35 backward away from the stud 38.

A transmitting member d() is connected to the lower end ot' the lever 30and passes around iixed guide pulleys 41, 42 and 43 (Fig. 1), portionsof chain or other flexible material being interposed where the memberpasses around the pulleys. After passing theguide pulley 43 the member40 is connected to a member '-14 having a closed slot- 45 formedtherein, and having a chain a6 secured to a lug or projection thereon.

A, stud i7 onthe end of an arm 48 projects through the slot 45. The armt8 is fixed to the end of a vertical shaft it) secured in bearingssupported on the cross-girt 51, forming a portion of the loom frame. Atits upper end the shaft 49 (Fig. 2) is providedy with an arm 52 having astud engaging a. grooved collar 5st keyed to the cam shaft. 10 andslidable thereon. A coil spring 55 encircles the shaitand issecured `at'one end to the shaft and atV the opposite end'to oneof the bearings 50.This spring tends to move the shaft in the direc tionof the arrow ashown in Fig. 2, thus holding the stud 47 yieldingly against the outerend'of the closed slot rEhe chain 46 passes around a lower fixed guidepulley (Fig. l) and an upper fixed guide pulley 61k (Fig. 2) and isconnected to a swinging arm (i3. The arm 63 is pivoted at 6st. upony aflange 65 formed on a member 66 pivoted upon a fixed stud 67 supportedvvby the cross girt 51. The member 66 is providedwith an extension GShaving apawl 69 formed on the side thereon near its outerl end. Aspring-70 is secured between thearm 63 and the extension G8, and tendsto swing the arm 63 to the left as viewed in Fig. 2..

Vsith these connections it will vbe seen that when the portion 30CLofthe indicating lever is held to .theiright-= by engagement with the.endrof the binder 33 thecollar lwill be held at the left, andthe arm 68willbe heldatthe right in the positions shown in Fig. 2.. Y

1 will nowdescribethemeehanism through whichthese parts control theposition of the pick roll13. A cam 71'l (Figs. 1, 2 andi) is fixed tothe cam shaft l0 and rotates in the direction of the arrow f in Fig. 4.This cam-V isA-provided with an inner groove 72, an outer groove 73andan intermediate or middle groove 74. These grooves areintereommunicating, and are traversed bv aY cam roll 75 mounted upon theend of anu arm 7 G swingingabout a fixed pivot 77. The arm' When theroll 7 5 is in the inner groove 72' the pickroll is inoperativeposition, and when` the roll 7 5 is in the outer groove73 the roll isinoperative.l When the roll v7 5 is in the intermediate or middlegroove74 the pick roll is in mid-positionk and requires only a slightmovement, in one direction or the other to render it operative'orinoperative.l As the grooves. 'Z2 and 73 both communicate at each endwith the groove 74 the roll is brought back to mid-position during apart ofeach revolution of the cam, and the picking device is thusadvantageously positioned for movement to either of its final positions.The three positions of the picking device andthe roll 13 are shown inFig. 8. p

The passageof the roll 75 from the groove 74 to the groove 72 lor thegroove 73 is'determined by a switch 80 mounted on a short shaft 81having a bearing in the cam 71 and-extending beyond the rear face of thecam:A A collar 82 is fixed to ythe shaft 81 and prevents endwisemovement of the shaft ink its bearing. `This collar is shown in dottedVlines in Fig. 3, andis provided with a lug 83 coperating with a spring84 mounted on the .hub of the cam, by whch means the switch is retainedyieldingly in either position to which .ity is moved. The collar issecured to the shaft 81 by (a screw 85 tol which is' also secured theend 'ofa kchain 86 which passes around a guide pulley 87 mountedon thehub of the ca1u71, and extends longitudinally of the camshaft 10 to aneye 88 carried by the slidable collar 54.

Whenever the collar54 is moved to the left, the pull upon the chain 86turns the shaft 81 to carry the switch 8O into the full line positionshown in Fig. 4. Such'movef.

ment of the collar 54 occurs every time the lay moves forward and bringsthe lever 35 (Fig. 7 into engagement with the fixed stud 38. If theactive shuttle boX contains a shuttle, the shuttle binder will be pushedforward into the path of the lever 30 and will retain the lever in theposition to which it is moved by the lever 35 and stud 38. The collar 54will thus be held in its lefthand position and the switch 80 will guidethe roll 75 into the outer groove 73 of the cam 71, thus rendering thepick roll 13 inoperative. If, however, the active shuttle box is empty,the portion 30a of the lever 30 will move to the left as the laycommences its backward movement. The tension upon the transmittingmember 40 will thus be relieved, permitting the spring 55 to movethecollar 54 to the right and also permitting the spring 7 O to swingthe cani arm 63 to the left.

The functions of the cam arm 63 and the pawl 69 will now be explained. Acollar 90 (Fig. 3) is xed to the outer end of the short shaft 81 towhich the switch 80 is secured. The collar is provided with atooth91positionedfor engagement by the pawl 69 onfthe-extension68.7offthemember 66. A, roll;92 is'mounted onastand93; secured to 'theperiphery rof the cam 71` in position to engagethecam'arm l63`when thearm Ais in itsV righthand position. When the; arm 63 is engaged by theroll92 it raises the pawl 69 out of the path of the tooth 91, the pawlbeing thus inoperative-=` This condition obtains whenevert the active.shuttle box is occupied and the transmitting member 46 isv held undertension by. the lever 30. Then the box is empty and no; tension isapplied tothe wire or ,chain 40, the, arm 63 swings to the left,andclears the roll 92. The pawl 69 thenremai'ns in the path `of the tooth91, engagingV the `same and thus moving the switch 80 tothe dottedlinefposition in Fig. 4. The roll 7 5 then enters the inner cani grooveL72 andthe pick roll 13l is moved to operative position; l.

' Brieiy summarized7 thel operation ofthe mechanism is as follows: Ateach beatof the lay the lever 30 is. operated by the stud 38 to slidethe collar 54- to the left yand to swingv the arm v63 to the right.ySuch movementof the, collar 54 sets theswitch 80 in position :to renderthepicking device inoperative. If the shuttle box controlled by thelever 30,:is occupiedv the parts are left in this positionand thepicking device continues inoperative.` If the box is empty thelever 30swing freely to relieve theten'sion on thewirev40,the arm 63 moves outof the path ofthe roll 92,.the pawl 69 engages the tooth 91 and turnsthe switch Ato-its opposite position, and the roll 7 5 through itsconnections moves the picking device to voperative position. The pickingdevices on each side of the loom are therefore inoperative whenever theactive shuttle box on the opposite side of the loom is occupied. In thisway the operations of the picking devices are largely reduced, with acorresponding decrease in wear of parts and power consumed.

The slot 45 (Fig. 1) in the member 44 provides a lost motion connectionso that Athe arm 63 may operate immediately after the lever 30 fails toengage the shuttle binder. The arms 48 and 52, and the collar 54 are ofconsiderable weight, and their vinertia might delay the operation of thearm 63 if the lost motion connection were omitted.

Having thus described my invention it will be evident that changes andmodifications can be made therein by those skilled in the art withoutdeparting from the spirit and scope thereof, as set forth in the claims,

y and I do not wish to be otherwise limited to 1. In a, pick-and-pickloom, in combina.

tion, a rotating shaft, a picking device mountedthereon;.meansftomovesaiddevic into midi out' ofi opera'tivey position,. andi con'- trol*mechanism for. said-mef-11"s,fsoid nie'ns includingfmeane! to move Seidpicking de# vice 4positively to midpositionr. onk each beat of' the' layand meansf-t'oi thereinfte'"vv move said?. device; from midpositfibn' inan' indicated direet'iont 9,. In. a. pcleand-piclir. loonni infVcombine-f tion;l ai rotating'. slmft, al pickingV device mounted-1thereon; means@ tc mcveseidi del vice intoi and yout ofi'operzniveipo'si-tion, sind control mechanism'l forhscid" means; saidmeans including" ai cam L having? iI111`e'I',:A olitei end` middlegrooves:y fo'rmed therein; a. cani follower.: connected; to move' solidipieking'd'r grooves" therein;v a? switch# mounted" onf:` said' notchv toturn seidr collar and sWitbli,; and niedrig,` controlled from one oftheactive sluit'tlej boxes forn'ioving said pstwl into and out ofoperativeA position;

5T: Inf ai pick-aind'pick 100m, in Combinintion;` a' rotating shaft,` afpicking device mounted thereon,-1neans tomovesztid device totmid-position, and shuttlecontrolled means-,for moving said devicetherefrom to operative" or' inoperative position.

6: Iny a picka'nd-pick loom, in combination, at rotating: shaft, a'picking device mounted thereoln mea-ns to -move saidl device to'ymid-positi0n,' and means to move said pickingi device from mid-positionto inoperdtive position if the active shuttle boX- on the side'. of the'loom opposite' to saidpicking device containedv shuttle.

7'. In a pick-and-piclil loom, in combination, ax lay,"pic'king'mechztnism including a u picketing-devices actuated vpositivelyandperiodioailly independently of the shuttley to niov'e'- saiid." pick'erm `1 from' full" operative positiononfeach vbeati ofthe lay; adetector ef# fe'ctive'to 'determine' the presence 'ork absence ofVshuttle in the. active* shuttle box associatedf Wthl said detector, and'means positively actuated independent-ly of the' shuttle, controlleldubySaid detector vand effective' yunderfsucbcontroltomove'szd pick arm tooperative 'position when said-Shuttle' box is einptyl In'testinionyWhereoflI-have hereunto -a-ffixed mysignature.

AUGUSTIN J. Y(3i-inviteTT'E.

Copieksofithi'stpatet maye'bewbtained-iforvercents each'byaddressigfth'e Commissionerof Patents,l

- Washington; D.l Ci

